package org.example.config;


import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

@Configuration
@EnableAsync
public class AsyncConfig {

    @Bean("asyncExecutor")
    public Executor asyncExecutor(){
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 配置核心线程数
        executor.setCorePoolSize(10);
        // 配置队列大小
        executor.setQueueCapacity(50);
        // 配置最大线程数
        executor.setMaxPoolSize(15);
        // 配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("asyncExecutor-");
        // rejection-policy:当pool已经达到max size的时候，如何处理新任务
        // CALLER_RUNS:不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 执行初始化
        executor.initialize();
        return executor;
    }
}
